High-pressure packless valve.



UNITED sTTEs PATENT ormon.

FRANK c. Eumex, or LoUIs, MISSOURI, 'assrenozamoinnosa KADESKI, or s'r. Louis,`

'MISSOURI lmantransenne: nAoKnnss v-ALvE.

specification df Letters-Panne Patented Dec.' 19, 1911.

.application led December 5, A1910. Serial No. 595,673.

.-To'all whomit'mayconcern:

'Be .it 'known that EI, FRANK vlC. EMnIon, a -citizen tofthe .United States, residing at St. fLouis, Missouri, have inventedacertain .new -and useful 'Improvement :in High-Pressure Packless Valves, of whichthe following is a full, clear, and'exact description, such as will -enable others skilletl in 'the yart to which it appertains to [make and use the same.

This -inventionrelates to valves, and particularly to packless valves, namely, valves fof'thetype in which no packing is used -for ,preventm leakage around the 'valve-stem.

One object of my invention is tof. rovide a 'high-pressure 'packless valve -is so designed that there is no liability ofthe stems sticking orbecoming jammed so wtightlythatit cannot be'turned easily.

Another object is to .provide a -valveof the type referred to in which the casing,'bonnet andeap are so constructed that lleakage between said-parts is absolutely prevented.

Another Objectis to providea valve that comprises on'ly .a few parts which are so designed that absolutely tight joints can be produced withoutzthe aneceity of vforming ground faces, thereby '.enablingithe Valve to be manufactured at a low cost.

Other objectsand desirable .features of my invention will bev hereinafter pointed out.

The figure of the drawings isa vertical sectional view of a valve constructed in accordance with my invention.

Referring to the drawing which illustrates the .preferred form lof my invention, A. designates the casing of the valve, B designates the bonnet, and C the cap at the upper end of the bonnet. The stem of the valve consists of two parts l and 2 that can move longitudinally relatively to each other, the lower part 1 of the stem being provided with a screw-threaded portion that passes through an internally screw-threaded bore in the bonnet, and the upper part 2 of the stem being provided with a non-circular extension 2a that .fits in a non-circular-shaped socket la ip the lower part 1 of the stem. A

The upper part 2 of the stem is provided with a long tapered portion 3 that fits in a correspondingly-shaped seat formed in the cap C, and a coiled expansion spring 4 is employed for forcing the upper part 2 0f.

the stem upwardly so as to hold the tapered Iportion ithereof tightly' seated. Means is provided ifor preventing said tapered portion "from becoming stuck -or wedged so tightly yin' its seat vthat the stem cannot be Iturned easily,and in the embodiment of my invention herein shown, said lmeans consists of a beveled surface 5 on the upper part- 2 of the stem arranged below the tapered portion 3 and flaring outwardly from the-base of said tapered portion in such a manner Athat -it limit-s the upwardmovenent of the part Q-ofthestem, 'the angle of said surface 5 beingigreater than the angle of the tapered =portion 3. rFhis beveled surface 5 is pref- `erably formed on the upper edge of a collar 6A on =the part 2 of the stem, and while I .prefer to form the portion 3 with a tapered surface of approximately 10F and the surface 5 atjapproximately 35 or 40, I wish it to be clearly understood that'the exact angle of :these'surfaces isimmaterial so far as my broad idea is concerned 'so long as the beveled surface 5 is of great enough angle to prevent the tapered 4por'tion 3 of the stem from sticking or becoming wedged in its seat.

The longfgradually tapered portion 3 of the stem insures an absolutely tight joint between the stem and the cap, and while the main function of the beveled surface 5 is to limit the upward movement of the stem and prevent jamming of same, this beveled surface 5 also tends to prevent leakage around the stem. This feature of providing the stem of the valve with two tapered or beveled surfaces of different angles is applicable to various types of valves so that I do not wish itto be understood that this feature is limited to use in a valve of the type or construction herein shown.

The cap C is screwed onto the upper end of the bonnet B, and one of the horizontally disposed coperating surfaces of said parts is provided with an annular rib 7 that will be mashed -downand thus produce an absolutely tight joint between said parts when the cap C is screwed down or tightened. I have herein shown the rib \7 arranged on. the upper end of the bonnet B but it will, of course,be understood that the same result could be obtained, by arranging said rib Von the cap C.

The bonnet B is provided at its lower end Vwith an integral ring-shaped flange 8 having integral screw-threads that coperate with external screw-threads on a ring-shaped flange 9 0n the casing A. Said bonnet is also provided with an annular tapered rib 10 that fits in a tapered recess 11 formed on the inner surface of the ange 9 on the casing adjacent the upper end of said fiange..

overcome the necessity of using a union for f connecting the bonnet to the casing, and I also obtain an absolutely tight lioint between these parts without the necessity of grinding said parts.

A valve of the construction above described is admirably `adapted for use on high-pressure lines for the long tapered portion 3 on. the valve stem' and the coperating seat for same inthe cap insures a tight joint around the valve stern, and the beveled surface 5 at the base of said tapered portion overcomes any possibility of the stem becoming jammed so ti htly in its seat that it cannot be turned easily. The rib 7 on the upper end of the bonnet and the annular tapered rib 10 on the lower end of the bonnet insure tight joints between the bonnet and cap and between the bonnet and casing, and as the valve comprises only7 a few parts which can be machined easily it can be manufactured at a low cost.

l Having thus described my invention, what I claim as new and desire to secure by Letters Patent is:

1. A valve comprising a casing provided with an externally screw-threaded ange, a bonnet rovided with an integral ringshaped flange that surrounds the flange on the casing, a cap screwed onto the upper end of sald bonnet, an annular tapered rib on said bonnet that fits snugly in a tapered recess in said casing, a valve stem provided with a tapered portion that fits in a seat in said cap, yielding means which exerts pressure on said stem and thus holds the tapered portion thereof seated, and a beveled surface on said stem at the base of said tapered p01'- tion for preventing said tapered portion from jamming orstlcking tightly in its seat.

2. A valve-comprising a casing, a bonnet connected to said'casing, a cap screwed onto the upper end of said bonnet, an annular tapered rib on said bonnet that fits snugly in a tapered 'opening in said easing, an annular ribon the upper end of the bonnet that is adapted to be mashed down by the cap when the cap is tightened, a valve stem having a long gradually tapered portion that lits in a seat in the cap, a collar on said stem having a beveled surface that flares outwardly from the base of said tapered portion and thus tends to prevent said tapered portion from sticking in its seat, and

a spring on said stem arranged under said collar.

In testimony whereof I hereunto aix my signature in the presence of two witnesses, this thirtieth day of November 1910.

FRANK C. EMRICK. Witnesses: y

WELLS L. CHURCH, GEORGE BAKEWELL. 

